My guess is a change to the gear system. Instead of gear sitting in your bag and banks they make a system where all the gear is just there in the character UI and you choose what to wear. With heirlooms available on all your characters as well.

There were just as many assholes before LFD as there are now. The difference is that now it takes much less time to place you in a group of assholes than before, so you see them more often.

People just aren't assholes yes or no. They are behaving like one.

If you got people from the same realm (and realm size matters here, too) they'll likely behave social. If you were to fly with as a group of 5 to the instance chances are you stick together after 1 wipe. In LFD you just yell, scream, leave, and requeue.

Yes you had drama queens and dickheads before too, but the signal to noise ratio was higher.

My experience in other MMOs of low pop realm vs high pop realm also confirms the above theory.

In the next pre-expansion patch they are going to add a rip in the space time continuum leading to the eventually combining of the Starcraft and Warcraft Universe. Formally known as Craftcraft and/or Titan.

THat is actually possible. There were already some clues of some Battle.net client software.

I can't see Blizzard wasting dev time on this after how horribly the in-game voice features failed.

Also the context doesn't really fit.
GC was responding specifically to a tweet that was talking about the introduction of Dungeon finder and LFR, so I can't help but imagine that this unannounced feature is something instance/raid related.

Perhaps they've finally worked out the tech needed to properly implement the spectator mode they've wanted to give us for quite a while.
Or maybe they're currently working to release SoO as a raid that has 10, 25 and 40 modes. They could be testing thunderforged for that reason, so that they can get a feel for how to balance better loot advantages for different raid sizes.

1- blizzard all-stars will be part of wow2- all races will be able to chose any class
3- some battle-net program similar to skype
4- path of titans

Finally human Shaman!!!!!!!!!!!!!!!!!!

Cross fraction Real ID grouping would be fucking awesome too (like in CoS it turns you into human even if you were Horde, but you still keep your abilities, group leader of group decides fraction like cross realm grouping).